366 lines
9.8 KiB
C
366 lines
9.8 KiB
C
/* $NetBSD: parseconf.c,v 1.5 1997/07/28 05:39:19 thorpej Exp $ */
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/*
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* Copyright (c) 1988, 1992 The University of Utah and the Center
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* for Software Science (CSS).
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Center for Software Science of the University of Utah Computer
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* Science Department. CSS requests users of this software to return
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* to css-dist@cs.utah.edu any improvements that they make and grant
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* CSS redistribution rights.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)parseconf.c 8.1 (Berkeley) 6/4/93
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*
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* From: Utah Hdr: parseconf.c 3.1 92/07/06
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* Author: Jeff Forys, University of Utah CSS
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)parseconf.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: parseconf.c,v 1.5 1997/07/28 05:39:19 thorpej Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include "defs.h"
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/*
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** ParseConfig -- parse the config file into linked list of clients.
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**
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** Parameters:
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** None.
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**
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** Returns:
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** 1 on success, 0 otherwise.
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**
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** Side Effects:
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** - Linked list of clients will be (re)allocated.
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**
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** Warnings:
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** - GetBootFiles() must be called before this routine
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** to create a linked list of default boot files.
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*/
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int
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ParseConfig()
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{
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FILE *fp;
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CLIENT *client;
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u_int8_t *addr;
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char line[C_LINELEN];
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register char *cp, *bcp;
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register int i, j;
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int omask, linecnt = 0;
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if (BootAny) /* ignore config file */
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return(1);
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FreeClients(); /* delete old list of clients */
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if ((fp = fopen(ConfigFile, "r")) == NULL) {
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syslog(LOG_ERR, "ParseConfig: can't open config file (%s)",
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ConfigFile);
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return(0);
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}
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/*
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* We've got to block SIGHUP to prevent reconfiguration while
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* dealing with the linked list of Clients. This can be done
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* when actually linking the new client into the list, but
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* this could have unexpected results if the server was HUP'd
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* whilst reconfiguring. Hence, it is done here.
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*/
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omask = sigblock(sigmask(SIGHUP));
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/*
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* GETSTR positions `bcp' at the start of the current token,
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* and null terminates it. `cp' is positioned at the start
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* of the next token. spaces & commas are separators.
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*/
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#define GETSTR while (isspace(*cp) || *cp == ',') cp++; \
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bcp = cp; \
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while (*cp && *cp!=',' && !isspace(*cp)) cp++; \
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if (*cp) *cp++ = '\0'
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/*
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* For each line, parse it into a new CLIENT struct.
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*/
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while (fgets(line, C_LINELEN, fp) != NULL) {
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linecnt++; /* line counter */
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if (*line == '\0' || *line == '#') /* ignore comment */
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continue;
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if ((cp = index(line,'#')) != NULL) /* trash comments */
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*cp = '\0';
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cp = line; /* init `cp' */
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GETSTR; /* get RMP addr */
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if (bcp == cp) /* all delimiters */
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continue;
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/*
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* Get an RMP address from a string. Abort on failure.
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*/
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if ((addr = ParseAddr(bcp)) == NULL) {
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syslog(LOG_ERR,
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"ParseConfig: line %d: cant parse <%s>",
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linecnt, bcp);
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continue;
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}
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if ((client = NewClient(addr)) == NULL) /* alloc new client */
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continue;
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GETSTR; /* get first file */
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/*
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* If no boot files are spec'd, use the default list.
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* Otherwise, validate each file (`bcp') against the
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* list of boot-able files.
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*/
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i = 0;
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if (bcp == cp) /* no files spec'd */
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for (; i < C_MAXFILE && BootFiles[i] != NULL; i++)
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client->files[i] = BootFiles[i];
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else {
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do {
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/*
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* For each boot file spec'd, make sure it's
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* in our list. If so, include a pointer to
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* it in the CLIENT's list of boot files.
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*/
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for (j = 0; ; j++) {
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if (j==C_MAXFILE||BootFiles[j]==NULL) {
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syslog(LOG_ERR, "ParseConfig: line %d: no boot file (%s)",
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linecnt, bcp);
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break;
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}
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if (STREQN(BootFiles[j], bcp)) {
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if (i < C_MAXFILE)
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client->files[i++] =
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BootFiles[j];
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else
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syslog(LOG_ERR, "ParseConfig: line %d: too many boot files (%s)",
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linecnt, bcp);
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break;
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}
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}
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GETSTR; /* get next file */
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} while (bcp != cp);
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/*
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* Restricted list of boot files were spec'd,
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* however, none of them were found. Since we
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* apparently cant let them boot "just anything",
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* the entire record is invalidated.
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*/
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if (i == 0) {
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FreeClient(client);
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continue;
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}
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}
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/*
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* Link this client into the linked list of clients.
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* SIGHUP has already been blocked.
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*/
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if (Clients)
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client->next = Clients;
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Clients = client;
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}
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(void) fclose(fp); /* close config file */
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(void) sigsetmask(omask); /* reset signal mask */
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return(1); /* return success */
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}
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/*
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** ParseAddr -- Parse a string containing an RMP address.
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**
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** This routine is fairly liberal at parsing an RMP address. The
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** address must contain 6 octets consisting of between 0 and 2 hex
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** chars (upper/lower case) separated by colons. If two colons are
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** together (e.g. "::", the octet between them is recorded as being
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** zero. Hence, the following addrs are all valid and parse to the
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** same thing:
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**
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** 08:00:09:00:66:ad 8::9:0:66:AD 8::9::66:aD
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**
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** For clarity, an RMP address is really an Ethernet address, but
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** since the HP boot code uses IEEE 802.3, it's really an IEEE
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** 802.3 address. Of course, all of these are identical.
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**
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** Parameters:
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** str - string representation of an RMP address.
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**
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** Returns:
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** pointer to a static array of RMP_ADDRLEN bytes.
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**
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** Side Effects:
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** None.
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**
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** Warnings:
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** - The return value points to a static buffer; it must
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** be copied if it's to be saved.
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*/
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u_int8_t *
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ParseAddr(str)
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char *str;
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{
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static u_int8_t addr[RMP_ADDRLEN];
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register char *cp;
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register unsigned i;
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register int part, subpart;
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bzero((char *)&addr[0], RMP_ADDRLEN); /* zero static buffer */
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part = subpart = 0;
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for (cp = str; *cp; cp++) {
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/*
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* A colon (`:') must be used to delimit each octet.
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*/
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if (*cp == ':') {
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if (++part == RMP_ADDRLEN) /* too many parts */
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return(NULL);
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subpart = 0;
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continue;
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}
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/*
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* Convert hex character to an integer.
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*/
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if (isdigit(*cp))
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i = *cp - '0';
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else {
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i = (isupper(*cp)? tolower(*cp): *cp) - 'a' + 10;
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if (i < 10 || i > 15) /* not a hex char */
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return(NULL);
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}
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if (subpart++) {
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if (subpart > 2) /* too many hex chars */
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return(NULL);
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addr[part] <<= 4;
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}
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addr[part] |= i;
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}
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if (part != (RMP_ADDRLEN-1)) /* too few parts */
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return(NULL);
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return(&addr[0]);
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}
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/*
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** GetBootFiles -- record list of files in current (boot) directory.
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**
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** Parameters:
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** None.
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**
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** Returns:
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** Number of boot files on success, 0 on failure.
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**
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** Side Effects:
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** Strings in `BootFiles' are freed/allocated.
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**
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** Warnings:
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** - After this routine is called, ParseConfig() must be
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** called to re-order it's list of boot file pointers.
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*/
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int
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GetBootFiles()
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{
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DIR *dfd;
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struct stat statb;
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register struct dirent *dp;
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register int i;
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/*
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* Free the current list of boot files.
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*/
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for (i = 0; i < C_MAXFILE && BootFiles[i] != NULL; i++) {
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FreeStr(BootFiles[i]);
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BootFiles[i] = NULL;
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}
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/*
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* Open current directory to read boot file names.
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*/
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if ((dfd = opendir(".")) == NULL) { /* open BootDir */
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syslog(LOG_ERR, "GetBootFiles: can't open directory (%s)\n",
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BootDir);
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return(0);
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}
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/*
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* Read each boot file name and allocate space for it in the
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* list of boot files (BootFiles). All boot files read after
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* C_MAXFILE will be ignored.
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*/
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i = 0;
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for (dp = readdir(dfd); dp != NULL; dp = readdir(dfd)) {
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if (stat(dp->d_name, &statb) < 0 ||
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(statb.st_mode & S_IFMT) != S_IFREG)
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continue;
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if (i == C_MAXFILE)
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syslog(LOG_ERR,
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"GetBootFiles: too many boot files (%s ignored)",
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dp->d_name);
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else if ((BootFiles[i] = NewStr(dp->d_name)) != NULL)
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i++;
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}
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(void) closedir(dfd); /* close BootDir */
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if (i == 0) /* cant find any boot files */
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syslog(LOG_ERR, "GetBootFiles: no boot files (%s)\n", BootDir);
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return(i);
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}
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